Electrical load-equalizing system.



B. G. LAMME. ELECTRICAL LOAD EQUALIZING SYSTEM. APPLICATION FILED NOV.6.190B.

925,356, Patented Jun 15,1909.

' WITNESSES: V NTOR 'QMM W 9% BY v ATTORNEY 50 mg considerableinertia being also coupled to tive forces of rangement is such that but comparatively simple and effective means that may be em- UNITED STATES PATENT onricn.

BENJAMIN c. LAMME, or PITTSBURG, PENNSYLVANIA,

ELECTRIC & MANUFACTURING COMPANY, A

ASSIGNOR TO WESTINGHOUSE CORPORATION OF PENNSYLVANIA,

ELECTRICAL LOAD-EQUALIZIN G SYSTEM.

Specification of Letters Patent. i PatentedJ'une 15, 1909.

Original application filed September 3, 1907, Serial No. 391,214. Divided and this application filed November 6 Serial No. 461,301.

To'all whom it may concern:

Be it known that I, BENJAMIN G. LAMME, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electrical Load- ;Equalizing Systems, of which the following is a specificatipn, this application being a division of my application, Serial No. 391,214, filed September 3, 1907.

ly invention relates to systems of electrical distribution, and particularly to means for e ualizing the load upon the generator or supp y station when the load upon the sys-- tem is variable.

The object of my invention is to provide and the field magnet windings are associated with phases of the circuit other than those to which the corresponding armatures are connected, in order that the generated and counter electromotive forces of the armatures may be nearly of the same phases as the electromotive forces of the circuits to which they are connected. The machines are caused to operate alternately as motors and generators by adjusting the ratio of the electromotive forces respectively of the distributing circuit and of the armatures of the machines in accordance with variations in the load afforded bythe translating devices, energy being stored in the fly-wheel when 0 crating the the machines as generators to supply current to the system. The adjustment of the ratio of the said electromotive forces is effected in the present instance by varying the active lengths of transformer windings that are interposed-in circuit between the the machines and the distributing circuit.

In the single figure of the accompanying drawing, primary windings 1 and 2 of two transformers 3 and 4 are connected, respectively, to. the different phases of a two-ph ase distributing circuit 5.67-8 that may be supplied from a generator 9, or from any ot er suitable source, secondary windings 10 and 11 of the transformers being subdivided and the several points of subdivision thereof being connected, respectively, to two sets of ploycd in connection with p01 phase alternating current systems of distribution for absorhing or yielding energy in accordance with variations in load upon the s stem, in such a manner that-the load upon t 1e generating or the system may remain supply station of I su )stantially constant or may not exceed a predetermined value- I It has heretofore been proposed to employ iiy-wheels or other devices having consider able inertiain systems of distribution that supply translating devices requiring widely varying amounts of power, and to so drive the fiy-wheelsand control their operation that the load upon the distributing circuit will remain substantial] constant, regardless of the variations in t 0 amount of power required by the translating devices. n the present system, a dynamo-electric machine t at may 0 erate either as a motor or as a generator an to which a fly-wheel is mechanically coupled, is directly associated with the distributing circuit, and the arcontroller 14. Armatures 15 and 16 of two dynamo-electric machines of the commutator type of construction'are connected, by means of the controller 14, to transformer windings 10 and 11, respectively, while the field magnet windings 18 and'19 of the dynamo-electric machines are connected to transformer windings 11 and 10, respectively. .It will thus be seen that the electromotive forces applied to the field magnet windings are substantially 90 out of phase with the electromotivc forces of the circuits small and-inexpensive machines need be provided and only a singleequalizer set is necessary for equalizing the load provided by a plurality of translating'devices.

In carryin the invention into effect, a lurality of mechanically coupled dynamo-e ec to which the armatures are connected, and trio .inachines of the commutator ty e, one the generated and counter electromotive for'ach phase of the system of distri ution, forces of the armaturcs will, therefore, agree are employed, a fly-Wheel or other parts havapproximately in phase with the elcctromothe circuits to which they are connected. Armatures 15 and 16 are mechanically cou led together, and are either provided with arge masses or are coupled to the Variousphasesof the'distributmgcircuit,

armatures of stationary'contact terminals 12 and 13 ofa' I v The generated electromotivo forces will be device 9 amount, the movable conducting segments- .plurality of mechanically coupled dynamon fly-Wheel 17 whereby the. rotatable system proi'ided with considerable inertia. The controlling device )4 comprises, further, two y stationery contact strips Zllrrnd 21 disposed respectively adjacent to the sets ol' contact 1 to ninuis 12 and i9, and two moruble oonnt' and 23 that engage the E ips and are actuiii pioporiionel in amount to that reoi the distrilnliinu circuit by a. suitn-blc load, such, for example, {15 on induction .rnotor The controller i l thus serves to adjust the points oi connection of the urinetures 1-3 and 16 with the transformer winds 10 end it in accordance with variations i the amount of cur ent traversing the distributing circuit, on r it thereby also adjusts the ratio oi the :tromotive forces respec- Lively of the distributing circuit and of the srn sures of the lynamo-elcctric. machines.

in the operation of the system, the current required of the distributing circuit by the load is less then a predetermined 22 and 23 of the controller 14 will occupy such positions that the nrinntures of the dynamo-nicetric nmchines will be connected between high-voltage points of the trensii ic1"-.vindings 1 end 11, and the machines will be caused to operate as motors, thus storin: er' gzy in the lli vzhcer l7 and in the nude l' the rotatable system. the is 1110 uses, the movable conducting segmcnts 22 and 23 oi the controller will be raise so us to connect the nrnniturcs 1-5 and 16 t roli' nge points of the tra'nsl'ornn ii, and the machines may then be oused to ope 21s enerntors, uti i." g the energy previously stored in the rotatable system as the actuating means therefor.

I cl 1. The tcrnatin'g as my invention: combination with e polypl'iase olcurrent distributmg circuit, and s electric machines having their ormntures which the corresponding associated, respectively, with differently phased electromotive lorces thereof, of

means for applying to the field magnet windin accordance with Variations in the amount oi current required oi the distributing" circuit.

2. The'coinl'murtion with e poiypnsse eli tcrneting current distributing circuit and a plurality of mechanically coupled dynamoelectric machines having their armature-s associated, respectively, with differently phased clectromotive forces thereof, of transl'orniers interposed in circuit between the ermnturcs of the machines and the distributing circuit, means r applying to the field nuignet windings of the machines electromotive forces that dillcr in phase, respcctively, from those of the said circuit with ermetures are associated, and means for adjusting the ratios of transformation of the translormers in sccordance with variations in the amount of current required of the distributing circuit.

3. The combination with an alternating current distributing circuit, a transformer connected thereto and o dynamo-electric machine connected to the transformer, of means for applying to the tic-id magnet windinc of the machine on elcctroinotive force dillerent in phase from that ol" ssid circuit, and means for adjusting the ratio of transl'oriuation ot the said transformer in accordance with vnristions inthe uinoui'it of current required of the distributing circuit.

4. The combination with an zilterneting current distributinu"circuit, a transformer connected thereto and a dynemo'electric machine connected to the transformer, of means for applying to the field magnet Wind Qrd in g of the machine an elcctrornotive force dillerent in phase from that of said circuit, and means for adgusting the retro oi tronsformation of the said transformer to cause the machine to operate as a niotor'when the current required of the distributing circuit 1s less than a predcternnncd amount and to operate-21's s gencretor when the said current exceeds the predetermined amount in testimony whereof, I have hereunto subscribed my name this 19th day oi' Oct. 1908. 1 e

. BENJ. G. Lnflihi'ijl. Witnesses p LIVINGSTONE, BmNEY HINES. 

